:root{--ink: #203a36;--paper: #f7f0d4;--red: #be4f3e;--river: #58afbf;--gold: #e9b949;--line: rgba(39, 67, 61, .18)}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;background:#1f4946;color:var(--ink);overflow-x:hidden}button{font:inherit}.shanghai-game-shell{min-height:100vh;padding:16px;background:radial-gradient(circle at 14% 12%,rgba(244,217,126,.26),transparent 30%),linear-gradient(150deg,#244f49,#173b3a 72%)}.game-header{width:min(1820px,100%);min-height:76px;margin:0 auto 12px;padding:10px 14px 10px 12px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:20px;color:#f8f1d8;border:1px solid rgba(255,255,255,.14);border-radius:18px;background:#113431d1;box-shadow:0 16px 38px #04181747}.game-brand{display:flex;align-items:center;gap:12px;min-width:272px}.game-brand-seal{width:48px;height:48px;display:grid;place-items:center;border-radius:14px 5px;background:var(--red);color:#fff8df;font:800 25px/1 Songti SC,serif;box-shadow:inset 0 0 0 2px #fff3,0 7px #7f3329}.game-brand p{margin:0 0 2px;color:#e4c56f;font-size:12px;letter-spacing:.24em}.game-brand h1{margin:0;font:800 22px/1.1 Songti SC,"Noto Serif SC",serif;letter-spacing:.06em}.game-rule-strip{display:flex;justify-content:center;gap:7px;flex-wrap:wrap}.game-rule-strip span{padding:7px 11px;border:1px solid rgba(247,239,207,.18);border-radius:999px;color:#fff8e1d6;background:#ffffff0d;font-size:12px}.game-restart{min-height:42px;padding:0 16px;border:1px solid rgba(255,255,255,.24);border-radius:12px;color:#fff9e9;background:#ffffff0f;cursor:pointer;transition:.2s ease}.game-restart:hover{background:#b84f3f;transform:translateY(-1px)}.game-restart:focus-visible,.answer-grid button:focus-visible,.winner-panel button:focus-visible{outline:3px solid #f5cf65;outline-offset:3px}.game-layout{width:min(1820px,100%);margin:0 auto;display:grid;grid-template-columns:minmax(720px,1fr) minmax(330px,410px);gap:12px;align-items:start}.game-board-column{min-width:0}.player-ribbon{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:10px}.player-card{min-width:0;height:66px;display:grid;grid-template-columns:auto auto minmax(0,1fr);grid-template-rows:1fr auto;align-items:center;column-gap:8px;padding:7px 9px;border:1px solid rgba(255,255,255,.12);border-radius:14px;color:#f8f0d7;background:#163936e0;box-shadow:0 8px 20px #051c1a2e;transition:transform .25s ease,background .25s ease}.player-card-active{transform:translateY(-3px);background:color-mix(in srgb,var(--player-color) 32%,#173b38);box-shadow:0 0 0 2px var(--player-color),0 10px 24px #051c1a47}.player-card-out{opacity:.42;filter:grayscale(.75)}.player-index{align-self:start;font:800 10px/1 sans-serif;color:#e5cb7b}.player-portrait{grid-row:1 / 3;width:41px;height:41px;display:grid;place-items:center;border-radius:50%;background:var(--player-color);color:#fff;font:800 19px/1 Songti SC,serif;box-shadow:inset 0 0 0 3px #ffffff40,0 4px color-mix(in srgb,var(--player-color) 55%,#112e2d)}.player-copy{min-width:0;align-self:end}.player-copy strong,.player-copy small{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.player-copy strong{font-size:15px}.player-copy small{color:#fff6da9e;font-size:10px;margin-top:2px}.knowledge-meter{grid-column:3;display:flex;gap:3px;align-self:start}.knowledge-dot{width:11px;height:8px;transform:skew(-16deg);border-radius:2px;background:#ffffff24}.knowledge-dot-on{background:#f1c54d;box-shadow:0 0 7px #f1c54d73}.shanghai-map{position:relative;width:100%;aspect-ratio:1200 / 760;overflow:hidden;isolation:isolate;border:8px solid #ece2bd;border-radius:25px;background:#d9dfb4;box-shadow:0 18px 48px #03191757,inset 0 0 0 2px #46473238}.shanghai-map:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none;z-index:2;background:linear-gradient(120deg,rgba(255,255,255,.13),transparent 20% 78%,rgba(55,83,63,.12));mix-blend-mode:soft-light}.shanghai-landmarks{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;z-index:0}.landmark-label{font:800 18px/1 Noto Sans SC,sans-serif;fill:#294a43;paint-order:stroke;stroke:#f2e9c8;stroke-width:5px;stroke-linejoin:round}.route-line{position:absolute;top:8%;right:5.5%;bottom:8%;left:5.5%;z-index:1;border:4px dashed rgba(75,86,62,.28);border-radius:30% 23% 26% 31%/25% 31% 26% 28%;pointer-events:none}.map-tile{--tile-color: #c88d47;position:absolute;z-index:5;width:clamp(40px,5.05vw,72px);height:clamp(30px,3.55vw,51px);display:flex;flex-direction:column;align-items:center;justify-content:center;transform:translate(-50%,-50%) rotate(-1deg) skew(-5deg);border:2px solid rgba(52,64,48,.38);border-radius:9px 11px 8px 10px;color:#fff;background:var(--tile-color);box-shadow:0 5px color-mix(in srgb,var(--tile-color) 55%,#3d443a),0 8px 12px #323f3038,inset 0 1px 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46%;background:#f0b584;border:1.5px solid #513c31}.student-hair{position:absolute;left:4px;top:1px;width:25px;height:17px;z-index:2;border-radius:54% 55% 35% 40%;background:#26333a;border:1.5px solid #4a382f}.student-hair:after{content:"";position:absolute;right:0;top:10px;width:6px;height:11px;border-radius:50%;background:inherit}.student-hair-long{height:27px;border-radius:50% 50% 42% 42%}.student-body{position:absolute;left:5px;top:25px;width:23px;height:20px;border-radius:8px 8px 5px 5px;background:var(--student-color);border:2px solid #f3dfb5}.student-glasses{position:absolute;left:1px;top:7px;width:7px;height:5px;border:1px solid #26333a;border-radius:50%;box-shadow:8px 0 0 -1px #f0b584,8px 0 #26333a}.student-name{position:absolute;left:50%;top:45px;transform:translate(-50%);padding:2px 4px;border-radius:5px;color:#fff;background:color-mix(in srgb,var(--student-color) 84%,#173531);font:700 8px/1 sans-serif;white-space:nowrap}@keyframes tokenBounce{0%,to{margin-top:0}50%{margin-top:-7px}}.map-title-plaque{position:absolute;z-index:4;left:51%;top:48%;transform:translate(-50%,-50%) rotate(-2deg);min-width:200px;padding:9px 18px 11px;text-align:center;color:#f8edd0;background:#aa493b;border:3px solid #f1d286;border-radius:10px 4px;box-shadow:0 8px #6f352e,0 12px 20px #37342633}.map-title-plaque span{display:block;font-size:10px;letter-spacing:.32em;opacity:.84}.map-title-plaque strong{display:block;margin-top:3px;font:900 19px/1 Songti SC,serif;letter-spacing:.08em}.subject-legend{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;padding:9px 4px 0;color:#f8f1d9c7;font-size:11px}.subject-legend span{display:flex;align-items:center;gap:5px}.subject-legend i{width:9px;height:9px;border-radius:2px;box-shadow:0 2px #0003}.quiz-panel{--subject-color: #d69a3b;position:sticky;top:16px;min-height:660px;padding:24px 22px;overflow:hidden;border:1px solid rgba(255,255,255,.2);border-radius:24px 10px;background:var(--paper);box-shadow:0 20px 48px #051c1a52,inset 0 0 0 5px #ffffff6b}.quiz-panel:before{content:"";position:absolute;inset:0 0 auto;height:8px;background:var(--subject-color)}.turn-heading{display:flex;justify-content:space-between;gap:16px;align-items:start}.turn-kicker{color:var(--subject-color);font-size:12px;font-weight:900;letter-spacing:.08em}.turn-heading h2{margin:6px 0 3px;font:900 32px/1 Songti SC,"Noto Serif SC",serif;color:#243e39}.turn-heading p{margin:0;color:#6d7569;font-size:12px}.turn-timer{flex:0 0 62px;height:62px;display:grid;grid-template-columns:1fr auto;place-content:center;align-items:end;border:3px solid color-mix(in srgb,var(--subject-color) 68%,white);border-radius:50%;color:#29423d;background:#fffaf0;box-shadow:0 5px color-mix(in srgb,var(--subject-color) 50%,#8d8876)}.turn-timer strong{font:900 26px/1 sans-serif}.turn-timer small{margin-bottom:2px;font-size:9px}.turn-timer-low{color:#b64035;animation:timerPulse .6s ease-in-out 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#78352d;cursor:pointer}@media(max-width:1180px){.shanghai-game-shell{padding:10px}.game-header{grid-template-columns:1fr auto}.game-rule-strip{display:none}.game-layout{grid-template-columns:minmax(600px,1fr) 340px}.player-card{height:58px;padding:5px 7px;column-gap:5px}.player-portrait{width:34px;height:34px;font-size:16px}.knowledge-dot{width:8px}.quiz-panel{min-height:590px;padding:20px 18px}}@media(max-width:900px){.game-layout{display:flex;flex-direction:column}.game-board-column,.quiz-panel{width:100%}.quiz-panel{position:relative;top:0;min-height:auto}.question-block{min-height:100px}.quiz-tip{display:none}}@media(max-width:640px){.shanghai-game-shell{padding:6px}.game-header{min-height:60px;margin-bottom:7px;padding:8px;border-radius:12px}.game-brand{min-width:0;gap:8px}.game-brand-seal{width:38px;height:38px;font-size:20px}.game-brand p{font-size:8px}.game-brand h1{font-size:16px}.game-restart{min-height:36px;padding:0 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#183c39;position:relative;min-height:100svh;overflow:hidden;color:var(--v3-ink);background:#0d413e}.generated-map{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;isolation:isolate;background:radial-gradient(circle at 21% 28%,rgba(255,234,151,.8),transparent 23%),radial-gradient(circle at 78% 23%,rgba(166,223,167,.7),transparent 26%),linear-gradient(145deg,#d9e5ae,#b9d39c 52%,#9bc9a0)}.generated-map-art{position:absolute;top:-2%;right:-2%;bottom:-2%;left:-2%;z-index:0;width:104%;height:104%;object-fit:cover;object-position:center 42%;opacity:.38;filter:saturate(.7) contrast(.88) blur(1px);mix-blend-mode:multiply}.generated-map-grid{position:absolute;top:0;right:0;bottom:0;left:0;z-index:0;opacity:.18;background-image:linear-gradient(28deg,transparent 48%,rgba(55,99,76,.22) 49%,rgba(55,99,76,.22) 51%,transparent 52%),linear-gradient(116deg,transparent 48%,rgba(255,251,220,.38) 49%,rgba(255,251,220,.38) 51%,transparent 52%);background-size:88px 88px,118px 118px;transform:scale(1.08) rotate(-2deg)}.generated-map-river{position:absolute;top:0;right:0;bottom:0;left:0;z-index:1;width:100%;height:100%;filter:drop-shadow(0 6px 6px rgba(25,76,72,.24))}.generated-map-river path{fill:none;stroke-linecap:round}.generated-river-bank{stroke:#fff4cceb;stroke-width:16}.generated-river-water{stroke:#52b6c7;stroke-width:12.5}.generated-river-glint{stroke:#dafbf49e;stroke-width:.8;stroke-dasharray:1.2 3.5}.generated-river-label,.generated-map-side{position:absolute;z-index:2;pointer-events:none;font-weight:900;letter-spacing:.22em}.generated-river-label{left:50.5%;top:43%;transform:translate(-50%,-50%) rotate(77deg);color:#ffffefdb;text-shadow:0 2px 4px rgba(17,83,89,.4);font-size:clamp(10px,.8vw,14px)}.generated-map-side{top:12%;padding:5px 10px;color:#274e3fa6;border-bottom:2px solid 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